Saltwater and freshwater fish tanks are enjoyable to have around the home. But is one better for beginner tank owners than the other?

American streams are home to mercury-filled fish, but what's the risk to you? Aug. 21, 2009— -- A study released by the U.S. Geological Survey found mercury in every freshwater fish from nearly ...

Eating just one serving of freshwater fish each year could have the same effect as drinking water heavily polluted with “forever chemicals” for an entire month, a new study finds. The equivalent ...

Rivers have been the lifeblood of human civilization throughout history, and yet we know surprisingly little about what lives in many of them – including the giant creatures that prowl their depths.

More and more people are picking up freshwater aquariums to add a splash of colour, some calm vibes, and a bit of daily joy ...

The Oyapock river, between Brazil and French Guiana, is one of the few waterways that a new paper identifies as being relatively undamaged by humans. Sebastien Brosse Two recent assessments of the ...

Cardinal tetras are famous for their glowing blue and bright red stripes that run across their bodies. People often mix them up with neon tetras, but cardinal tetras have a bright red line that goes ...

The world's largest recorded freshwater fish, a giant stingray, has been caught in the Mekong River in Cambodia, according to scientists from the Southeast Asian nation and the United States. The ...

BANGKOK — The world's largest recorded freshwater fish, a giant stingray, has been caught in the Mekong River in Cambodia, according to scientists from the Southeast Asian nation and the United States ...

A new report on the conservation status of New Zealand's freshwater fish is the most comprehensive yet, sharpening focus on ...